Elevators that can whisk people and cargo up from the planet’s surface into space could spell an end to polluting rockets. But making them reality is a challenge. Nic Fleming investigates.
The supermassive black hole is 40 million times as massive as the sun and powers a quasar that existed 700 million years after the Big Bang.
The asteroid zoomed by Earth at a perfectly safe distance of around 1.8 million miles (2.9 kilometers).
Images show surprise changes to the spacecraft as it interacted with the atmosphere.
